std :: bind不能用於字符串向量

有沒有辦法讓這段代碼編譯？std :: bind不能用於字符串向量

1 #include <functional> 
2 #include <vector> 
3 #include <iostream> 
4 using namespace std; 
5 void f1(int x, int y){} 
6 void f2(int x, vector<string> v) {} 
7 int main() 
8 { 
9  f2(2, {{"hello", "it's", "me"}}); 
10  auto g1 = bind(f1, placeholders::_1, 3); 
11  auto g2 = bind(f2, placeholders::_1, {{"hello", "it's", "me"}}); 
12  return 0; 
13 }

G1工作正常，G2給出了一些複雜的編譯錯誤

編輯： 徇衆要求我給你的錯誤：

In file included from test.cpp:1:0: 
/usr/include/c++/5/functional: In instantiation of ‘struct std::_Bind_check_arity<void (*)(int, std::vector<std::__cxx11::basic_string<char> >)>’: 
/usr/include/c++/5/functional:1439:12: required from ‘struct std::_Bind_helper<false, void (&)(int, std::vector<std::__cxx11::basic_string<char> >)>’ 
/usr/include/c++/5/functional:1462:5: required by substitution of ‘template<class _Func, class ... _BoundArgs> typename std::_Bind_helper<std::__is_socketlike<_Func>::value, _Func, _BoundArgs ...>::type std::bind(_Func&&, _BoundArgs&& ...) [with _Func = void (&)(int, std::vector<std::__cxx11::basic_string<char> >); _BoundArgs = {}]’ 
test.cpp:11:67: required from here 
/usr/include/c++/5/functional:1410:7: error: static assertion failed: Wrong number of arguments for function 
     static_assert(sizeof...(_BoundArgs) == sizeof...(_Args), 
    ^
test.cpp: In function ‘int main()’: 
test.cpp:11:67: error: no matching function for call to ‘bind(void (&)(int, std::vector<std::__cxx11::basic_string<char> >), const std::_Placeholder<1>&, <brace-enclosed initializer list>)’ 
    auto g2 = bind(f2, placeholders::_1, {{"hello", "it's", "me"}}); 
                   ^
In file included from test.cpp:1:0: 
/usr/include/c++/5/functional:1462:5: note: candidate: typename std::_Bind_helper<std::__is_socketlike<_Func>::value, _Func, _BoundArgs ...>::type std::bind(_Func&&, _BoundArgs&& ...) [with _Func = void (&)(int, std::vector<std::__cxx11::basic_string<char> >); _BoundArgs = {}; typename std::_Bind_helper<std::__is_socketlike<_Func>::value, _Func, _BoundArgs ...>::type = std::_Bind<void (*())(int, std::vector<std::__cxx11::basic_string<char> >)>] 
    bind(_Func&& __f, _BoundArgs&&... __args) 
    ^
/usr/include/c++/5/functional:1462:5: note: candidate expects 1 argument, 3 provided 
/usr/include/c++/5/functional:1490:5: note: candidate: template<class _Result, class _Func, class ... _BoundArgs> typename std::_Bindres_helper<_Result, _Func, _BoundArgs>::type std::bind(_Func&&, _BoundArgs&& ...) 
    bind(_Func&& __f, _BoundArgs&&... __args) 
    ^
/usr/include/c++/5/functional:1490:5: note: template argument deduction/substitution failed: 
test.cpp:11:67: note: couldn't deduce template parameter ‘_Result’ 
    auto g2 = bind(f2, placeholders::_1, {{"hello", "it's", "me"}}); 
                   ^

來源

2016-01-26 titus

解決了這個問題，它需要'矢量 {{「你好」，「它是」，「我」}}'。只需要一些stackoverflow橡皮戳 – titus

當提出有關編譯錯誤的問題時，請提供錯誤和行號。它會增加某人回答的機會。一般而言，您希望儘可能方便某人幫助您。如果您解決了問題，請將解決方案作爲答案發布，並接受以供將來的觀衆使用。 –

它不是一個字符串數組，而是一個字符串矢量，它有很大的不同，請編輯標題。 –

#include <functional> 
#include <vector> 
#include <iostream> 
using namespace std; 
void f1(int x, int y){} 
void f2(int x, vector<string> v) {} 
int main() 
{ 
    f2(2, {{"hello", "it's", "me"}}); 
    auto g1 = bind(f1, placeholders::_1, 3); 
    auto g2 = bind(f2, placeholders::_1, vector<string>{{"hello", "it's", "me"}}); 
    return 0; 
}

來源

2016-01-26 17:19:33 titus

std :: bind不能用於字符串向量

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